magnet filter

1600 William Gilbert issued a "l magnetic drawer and the Earth." In this work he described his model of the Earth to do many experiments he came to the Earth magnetic field is generated is a compass forever guidelines reasons.magnet filter Hans Oster's work so that people know the relationship between electricity and magnetism 1831 Michael Faraday discovered magnetic flux can change coil coil voltage. James Maxwell electromagnetic and optical property of the electromagnetic areas.